CN201715398U

CN201715398U - Led ceiling lamp

Info

Publication number: CN201715398U
Application number: CN201020218691XU
Authority: CN
Inventors: 王梅梅
Original assignee: QINGDAO GREEN PHOTOELECTRIC TECHNOLOGY Co Ltd
Current assignee: QINGDAO GREEN PHOTOELECTRIC TECHNOLOGY Co Ltd
Priority date: 2010-06-08
Filing date: 2010-06-08
Publication date: 2011-01-19
Anticipated expiration: 2020-06-08

Abstract

The utility model discloses an LED ceiling lamp which comprises a lamp shade, a circuit board and a power panel, wherein the circuit board is round and is provided with 360 LED chips on a plurality of rings, the distance between every adjacent two LED chips is 12 millimeters, the LED chips are all connected on a copper foil of the circuit board, the power panel is provided with a constant current source control chip, the power panel is externally connected with an alternating-current power supply, and the output of the power panel is connected with the circuit board; as for the LED chips, the lighting angle is 105 degrees, the luminous flux is 5 to 7 lumens, the rated current is 16.7 milliamperes, the rated voltage is 3 to 3.2 volts; BP2808 type constant current source control chip is adopted; an epoxy resin plate with the thickness of 1 millimeter is used as the circuit board, and the diameter of the plate is 340 millimeters; and the circuit board is provided with a positioning hole and a mounting hole. The LED ceiling lamp has uniform illuminance and higher brightness, and avoids shadow area; and simultaneously, the special constant current source control chip is adopted, therefore, the impact to a power switch is low, and the power stability is high, thus prolonging the service life.

Description

The LED lamp affixed to the ceiling

Technical field

The utility model relates to a kind of light fixture, particularly a kind of LED lamp affixed to the ceiling.

Background technology

Lamp affixed to the ceiling in the market mainly is a fluorescent lamp, is made up of lampshade, annular fluorescent tube, ballast and chassis; Also having the sub-fraction lamp affixed to the ceiling is the LED lamp affixed to the ceiling, and its led chip squarely array is concentrated the center that is distributed in lamp panel, and the power supply employing is the RC reduction voltage circuit of simple economy.

The technical problem that present lamp affixed to the ceiling exists has:

(1) existing fluorescence lamp affixed to the ceiling is mainly reflected in:

1) luminous efficiency: the luminous efficiency 55-80lm/w of fluorescent lamp, the luminous efficiency of LED is more than 100lm/w.

2) Luminaire efficiency: fluorescent lamp is that 360 degree are luminous, and the light that sends does not in the other direction just have any use, so fluorescent lamp adopts the lampshade of a white usually, can the backlight of quite a few be reflected, in general, the Luminaire efficiency of fluorescent lamp approximately has only 70%.And LED is that 105 degree are luminous, so be effective light all.

3) power-efficient: the 36WT8 fluorescent lamp with philips company is an example, its rated output power is 36w, but owing to inserted ballast, the actual measurement input power is 42.4W, iron inductance loss just 6.4W, efficient is reduced to 85%, and most of homemade iron inductance power consumptions are more than 10W, and power factor is lower than 0.512.The LED lamp of a 18w needs only the input power of 20w, and power factor can reach more than 0.9.

4) life-span: fluorescent lamp has only 5000 hours usually, and what some was homemade has only 300 hours.The LED lamp can reach more than 50,000 hours.

5) mercury content: the mercury that contains 25-45mg in the 36mm fluorescent lamp, the mercury that contains 20mg among the 26mm (T8), fluorescent lamp all are to adopt frangible glass as shell, in case broken, wherein mercury can be evaporated in the air at once, but the mercury concentration in the moment surrounding air reaches 10-20mg/m ³, the 1000-2000 that surpasses national regulation doubly, and mercury is the noxious material extremely harmful to human body.The semiconductor LED electroluminescent does not contain any noxious material, is the pollution-free light source of a kind of complete environmental protection.

6) colour rendering index: the colour rendering index of incandescent lamp is 95, and fluorescent lamp is 65-80, the LED lamp then can＞80

7) ultraviolet radiation: most of fluorescent lamp all has ultraviolet radiation in various degree, the ultraviolet radiation that has in addition arrived can disinfection degree, fluorescent lamp is all used ultraviolet ray excited light-emitting phosphor, and all can there be ultraviolet ray all fluorescent lamps (comprising power saving fluorescent lamp) lining.If be used for closely throwing light on, eyes are being subjected to unconsciously than major injury.When 1～2 meter of distance fluorescent lamp, its ultraviolet ray will have certain injury to human eye, and in 0.6 meter (general desk lamp height all is no more than this distance), injury more can aggravate.The LED lamp does not have ultraviolet ray.

(2) existing LED lamp affixed to the ceiling is embodied in: after the LED lamp affixed to the ceiling is lighted, can see that whole light fixture has only the central area that light is arranged, become shadow on every side, illumination is low, and the utilization rate of light fixture is low.Power source performance meeting first mate degree influences the life-span of LED, and the RC voltage dropping power supply is simple, cost is low, efficient is higher but switching surge is bigger, and is stable inadequately.

The utility model content

For solving the infertile and power switch shock problem of LED illumination, the utility model provides a kind of LED lamp affixed to the ceiling.

The utility model LED lamp affixed to the ceiling, comprise lamp housing, wiring board and power panel, wherein: wiring board is circular, divide some rings that 360 LEDs chips are installed on it, distance between the led chip is 12mm, is connected on the Copper Foil on the wiring board, and power panel is provided with the constant-current source control chip, the power panel external AC power supply, power panel output connection line plate.

It is 105 ° that described led chip adopts lighting angle, and luminous flux is 5-7lm, and rated current is 16.7mA, and rated voltage is the chip of 3-3.2V.

Described constant-current source control chip adopts BP2808.

Described wiring board adopts the epoxy resin board of 1mm thickness, and the diameter of plate is 340mm.

Described wiring board is provided with locating hole and installing hole.

The utility model lamp affixed to the ceiling, illumination is even, and brightness is higher, has avoided the shadow district; Owing to just having found pleasure in special constant-current source control chip, power switch impacts very little simultaneously, and power supply stability is high, thereby has prolonged service life.

Description of drawings

Fig. 1 is the wiring board schematic diagram of the utility model lamp affixed to the ceiling;

Fig. 2 is the schematic diagram of the power panel of the utility model lamp affixed to the ceiling.

The specific embodiment

This LED lamp affixed to the ceiling is made up of power supply, wiring board and lamp housing, and the diameter of wiring board is near the diameter of lamp panel, and because led chip adopts 105 ° of lighting angles, so when the distance between the led chip remains on the 12mm left and right sides, can reach reasonable illumination.

Lamp affixed to the ceiling with 18w is an example

(1) wiring board is seen Fig. 1, and this kind of lamp affixed to the ceiling accepted standard lamp housing chassis diameter is 380mm.

The model of plate is GREEN-∮ 340-360, the diameter of plate is 340mm, and piece number of led chip 1 is 360, is connected on the Copper Foil 2, wherein by indicating three locating holes, 3 usefulness plastics bayonet sockets wiring board is fixed on the lamp panel, three installing holes 4 can be fixed on lamp panel on the metope by screw.

The selection of wiring board is an epoxy resin, about thickness 1mm.

Led chip adopts 105 ° of white lights, and luminous flux is between 5～7lm, and rated current is 16.7mm, and rated voltage is 3-3.2v.

(2) power supply adopts BP2808 constant current control chip, and PCB figure sees Fig. 2.

Main component parameter of power supply such as following table

Title	Sequence number	Numerical value/model	Encapsulation
				Chip	U1	BP2808	SOP-8
FET FET	Q1	FRC20	TO-252
				Protective tube	F1	500mA
Inductance	L1	5mh

Rectifier bridge	D1	DB107S
				Diode	D1～D4	M7
Fast recovery diode	D5	ES1J	SMA
				Electrochemical capacitor	C1、C2	4.7uf/400v
CBB electric capacity	C3	103J/630V	RAD0.4
				Electric capacity	C4、C5	3.2uf	0805
Resistance	R1、R2、R3、R4、 R5、R7、R9	274、274、514、514 120、204、3R60	0805

(3) effect of invention

Compared with prior art, these kind of LED lamp affixed to the ceiling energy-conserving and environment-protective can reach reasonable illumination, and power supply are stable and reliable for performance.

Claims

1. LED lamp affixed to the ceiling, comprise lamp housing, wiring board and power panel, it is characterized in that: wiring board is for circular, divide some rings that 360 LEDs chips are installed on it, distance between the led chip is 12mm, is connected on the Copper Foil on the wiring board, and power panel is provided with the constant-current source control chip, the power panel external AC power supply, power panel output connection line plate.

2. LED lamp affixed to the ceiling according to claim 1 is characterized in that: it is 105 ° that described led chip adopts lighting angle, and luminous flux is 5-7lm, and rated current is 16.7mA, and rated voltage is the chip of 3-3.2V.

3. LED lamp affixed to the ceiling according to claim 2 is characterized in that: described constant-current source control chip adopts BP2808.

4. LED lamp affixed to the ceiling according to claim 3 is characterized in that: described wiring board adopts the epoxy resin board of 1mm thickness, and the diameter of plate is 340mm.

5. LED lamp affixed to the ceiling according to claim 4 is characterized in that: described wiring board is provided with locating hole and installing hole.